Valve.



VALVE.

APPLICATION man MAR. 20. 1916.

1,225,974. Patented May15,`1917.

` A m Enum 'si ,tir

JOHN J. LANE, OF ST. LOUIS, MISSOURI.

VALVE.

Specification of Letters Patent.

Patented Mayk 15, i917 Application filed March 20, 1916. Serial No. 85,346.

To @ZZ whom it may concern.'

Be it known that I, JOHN J. LANE, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Valves, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to valves, and more particularly to packless valves, namely, valves of the type in which no stutling box or other packing is necessary for preventing leakage around the valve stem.

One object of my invention is to provide a valve of the type referred to which comprises fewer parts than valves of this general type heretofore in use.

Another object is to provide a packless valve in which the valve stem and casing are provided with cooperating conical surfaces, and a spring that tends to keep said surfaces in intimate engagement is arranged above said surfaces so that the medium that passes through the valve will not come in contact with said spring and tend to deteriorate the same.

Another object is to provide a packless valve in which threads on the valve stem cooperate with internal threads formed directly in the valve disk, so as to cause said valve disk to move vertically upwardly or downwardly to open or close the valve, whenever the valve stem is rotated.

A still further object is to provide a valve of the character described in which the pressure of the medium passing through the valve is utilized to prevent leakage around the valve stem. Other objects and desirable features of my invention will be hereinafter pointed out.

The figure of the drawings is a vertical sectional view of a valve constructed in accordance with my invention.

Referring to the drawing which illustrates the preferred form of my invention, A designates the casing of the valve, B designates the valve disk and C designates the bonnet. The valve disk B herein shown comprises a portion l that is adapted to cooperate with the seat 2 in the casing A, and an upwardly-extending portion 3 that is provided with laterally-projecting wings or lugs 4c that cooperate with vertical guides 5 in the bonnet C, so as to prevent said disk B from rotating, said portion 3 being provided with an internal screw thread 6 that cooperates with an externally screw-threaded portion 7 of the valve stem D. rl`he valve disk B and its cooperating seat are herein shown as applied to an ordinary globe valve, but I wish it to be understood that my invention is not limited to a valve of this particular type, as it is obvious that my invention is equally applicable to various other types of valves. The stem D is provided intermediate its ends with a conical portion 8 that cooperates with a correspondingly shaped seat 9 formed in the bonnet C, said bonnet being provided with a pocket 10 above the conical seat 9 in which is arranged a coiled expansion spring l1 that lies between a shoulder 12 formed by the bottom of the pocket l0, and a removable abutment 13 carried by said stem. The pocket lO is circular in cross section and the.abutment 13 isv provided with a circular portion that fits snugly in the upper end of said pocket, said abutment being provided with a squared central bore that ts on a correspondingly-shaped portion lll on the stem D. The hand wheel 15 for rotating the stem bears directly against said abutment, and a nut lo arranged above said wheel on a.

screw-threaded portion 17 of the stem D, acts to `prevent said abutment from moving vertically with respect to the stem when the valve is in service.

When the valve is in its open position, as shown in the drawing, the medium passing through the valve is free to enter the inside of the bonnet C and exerts upward pressure on the base of the conical portion 8, thus keeping said conical portion pressed tightly against its seat 9 independently of the spring l1 and preventing leakage around the valve stem.

Under ordinary service the cooperating conical surfaces 8 and 9 are fully adequate to prevent leakage around the valve stem D, but to take care of unusual conditions, such as when a small particle of foreign matter becomes lodged between said surfaces and thus prevents said surfaces from engaging each other intimately, I have provided additional means for preventing leakage. This means consists of a washer 18 of rubber or other suitable resilient mate-rial that lies in the base of the pocket l() and upon which the lower end of the spring l1 rests, the pressure exerted by said spring acting to spread said washer and cause the same to engage the iic stem tightly, and thus prevent leakage between the bonnet and valve stem at the point where said washer engages the same.

In the event that the washer 18 should become worn to such an extent that the same is unserviceable in an emergency, I have provided the removable abutment 13 and the pocket 10 of the bonnet C with alining annular grooves 19 in which suitable packing may be inserted temporarily until such a time when the coperating conical surfaces 8 and 9 can be cleaned or reground. The precise method of introducing packing into the grooves 19 is immaterial, but l have found in practice that a strip of yielding packing material laid in the groove 19 of the abutment 13, when said abutment is separated from the pocket 10, can be easily forced down the side wall of said pocket when replacing the abutment, said packing expanding into the groove 19 of the pocket 10 as soon as said grooves aline.

1t is obvious that the removable abutment 13 could be made integral with the hand wheel 15 without departing from the spirit of my invention, said abutment being'made from a separate piece of metal merely for economy of manufacture.

From the foregoing it will be seen that I have devised a valve which is very simple in construction; in which the valve stem is formed of a single piece, instead of the usual two telescoping parts, and threaded directly into the valve member proper, thus eliminating several parts in the construction of my valve; in which no screw-threaded cap piece is necessary on the upper end of the bonnet; and in which all of the parts comprising the valve are of simple, rugged design that are not likely to get out of order and which can be produced at a low cost of manufacture. The spring 11 need vnot be as large or strong as is ordinarily used in valves of this general type, as its only function in my valve is to keep the conical surfaces 8 and 9 in engagement with each other when the valve is closed, or just starting to open, for when the valve is fully open, the pressure of the medium passing therethrough keeps said surfaces tightly together and prevents leakage at this point.

The valve can be taken apart for inspection or repair easily and quickly by simply unscrewing the bonnet C from the valve body or casing A, and thereafter removing the single nut 16 on the upper end of the valve stem D.

Having thus described my invention, what l claim, and desire to secure by Letters Patent, is:

A valve, comprising a casing provided with a valve seat, a valve disk that coperates with said seat and which is provided with an upwardly-extending bossa said boss having aninternally-screw-threaded bore and a plurality of laterally-projecting lugs or wings, a bonnet arranged on said casing and providedwith guideways that coperate with said lugs, said bonnet being also provided with a conical portion, a one-piece valve stem having a threaded portion that coperates with the threaded bore in said valve disk and also a conical shoulder that cooperates with the conical portion of said bonnet so as to prevent leakage around said valve stem and out of the upper end of said bonnet, said bonnet having `a cylindrical pocket that surrounds said valve stem above said conical portion, a resilient washer in the base of said pocket, an abutment carried by said valve stem and lying partly within said pocket, said abutment and pocket being provided with alining grooves for the re-- ception of packing material, and a coiled expansion spring interposed between said abutment and said washer, said spring ex` erting pressure on said washer so as to eX pand the same and cause it to tightly engage the valve stem and prevent leakage around same in case the first-mentioned leak-preventing means becomes inefficient.

ln testimony whereof I hereunto aiix my signature in the presence of two witnesses, this seventeenth day of March, 1916.

JQHN J. LANE.

Witnesses WELLS L. CHURCH, GEORGE BAKEWELL.

Copies of this patent may be obtained im' ve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

